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http://hdl.handle.net/2445/162070
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DC Field | Value | Language |
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dc.contributor.author | LHCb Collaboration | - |
dc.contributor.author | Calvo Gómez, Míriam | - |
dc.contributor.author | Camboni, Alessandro | - |
dc.contributor.author | Coquereau, Samuel | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Gascón Fora, David | - |
dc.contributor.author | Gironella Gironell, Pere | - |
dc.contributor.author | Graciani Díaz, Ricardo | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Vilasis-Cardona, Xavier | - |
dc.date.accessioned | 2020-05-22T16:12:22Z | - |
dc.date.available | 2020-05-22T16:12:22Z | - |
dc.date.issued | 2019-11-22 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/162070 | - |
dc.description.abstract | Results are reported from a search for the rare decays Bs0→τ±μâ' and B0→τ±μâ', where the τ lepton is reconstructed in the channel τ-→π-π+π-ντ. These processes are effectively forbidden in the standard model, but they can potentially occur at detectable rates in models of new physics that can induce lepton-flavor-violating decays. The search is based on a data sample corresponding to 3 fb-1 of proton-proton collisions recorded by the LHCb experiment in 2011 and 2012. The event yields observed in the signal regions for both processes are consistent with the expected standard model backgrounds. Because of the limited mass resolution arising from the undetected τ neutrino, the Bs0 and B0 signal regions are highly overlapping. Assuming no contribution from B0→τ±μâ', the upper limit B(Bs0→τ±μâ')<4.2×10-5 is obtained at 95% confidence level. If no contribution from Bs0→τ±μâ' is assumed, a limit of B(B0→τ±μâ')<1.4×10-5 is obtained at 95% confidence level. These results represent the first limit on B(Bs0→τ±μâ') and the most stringent limit on B(B0→τ±μâ'). | - |
dc.format.extent | 11 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.123.211801 | - |
dc.relation.ispartof | Physical Review Letters, 2019, vol. 123, num. 21, p. 211801 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.123.211801 | - |
dc.rights | (c) American Physical Society, 2019 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Leptons (Física nuclear) | - |
dc.subject.classification | Col·lisions (Física) | - |
dc.subject.classification | Protons | - |
dc.subject.classification | Neutrins | - |
dc.subject.other | Leptons (Nuclear physics) | - |
dc.subject.other | Collisions (Physics) | - |
dc.subject.other | Protons | - |
dc.subject.other | Neutrinos | - |
dc.title | Search for the Lepton-Flavor-Violating Decays Bs0 →τ±μâ' and B0 →τ±μâ' | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 696333 | - |
dc.date.updated | 2020-05-22T16:12:22Z | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/792684/EU//pANUCSTR | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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696333.pdf | 379.33 kB | Adobe PDF | View/Open |
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